Seems simple enough, however I decided to create note for that.
For example, /etc/fstab has:
/dev/disk/by-id/scsi-SATA_Hitachi_HUA7230_MK0371ZZZZZZZZZ-part1 /mnt/3tb ext3 user 0 0
So, any user can mount it. But you must permit for mounted system to have permission. Lets see listing:
username@somehost:/mnt/3tb$ ls -alh
total 24K
drwxrwxr-x 3 username root 4.0K Feb 14 12:28 .
drwxr-xr-x 9 root root 4.0K Dec 27 2011 ..
drwx—— 2 root root 16K Feb 14 12:28 lost+found
The . directory (not mountpoint directy itself) should be given chmod 775 . and chown username . for having correct permission rules.